#include <cstdio>
#include <cstdlib>
#include <cmath>
//using namespace std;

int main() {
    printf("fabs(7.5) = %f\n", fabs(7.5));
    printf("floor(7.5) = %f\n", floor(7.5));
    printf("fabs(0.0) = %f\n", fabs(0.0));
    printf("ceil(0.0) = %f\n", ceil(0.0));
    printf("fabs(-6.4) = %f\n", fabs(-6.4));
    printf("ceil(-6.4) = %f\n", ceil(-6.4));
    printf("ceil(-fabs(-8 + floor(-5.5))) = %f\n", ceil(-fabs(-8 + floor(-5.5))));
    exit(EXIT_SUCCESS);
}

